Manifolding book



Oct. l, 1929. HUFFMAN MANIFOLDING BOOK Filed Feb. 2l. 1925 1N VE NYSE- Patented Oct. 1, 1929 UNITED STATES PATENT @Price LoUI's HUFFMAN, or TORONTO, ONTARIO, CANADA, AssIGNoR To TORONTO TYPE FOUNDRY ooMrANY, LIMITED, OF TORONTO, CANADA MANIFOLDING' BooK Application led February 21, 1925. Serial No. 10,784.HE!SSU This invention relates to that type of manifolding book shown and described in United States yapplication 1,608/25, filed January th, 1925, in which a separate carbon sheet is yemployed with each set of duplicates and originals, the carbon sheet being formed of a Very thin paper very lightly coated,- a book being thus obtained possessing many of the advantages of both ,the carbon leaf and the automatic books.

For some purposes it is an objection that4 the carbon sheets after use must be torn out or else remain` attached to the stub of the book. In either case there is a possibility of the user soiling his hands with the carbon coating of the carbon sheets or merchandise being soiled by the exposed sheets.

My object in the present invention is to-devise a book in which the coated surfaces of the carbon sheets are at all timesfsoprotected that neither the users hands nor merchandise nor papers can come into Contact with them in the ordinary use of the book.

I attain my objects by forming the duplicates of a thin translucent paper and securing behind each duplicate sheet a sheet of carbonpaper coated only onthe side next the duplicate sheet, The two sheets are so connected that the carbon sheets turn with the duplicate sheets'in Athe handling of the book. When itis desired that duplicates shall be removable the duplicate sheet and the carbon sheet'are so connected that the one covers the other both when in the book and after removal. Y The invention is hereinafter more specilicallyg described and is illustrated in the accompanying drawings in whichz Fig. 1 is a side elevation of part of what is known as a single sheet manifolding book constructed in accordance with my invention; j

- Fig. 2 a similar view-illustrating the application of my invention to thatl` type of book in Which the orginal sheet is connected with the outer end of a duplicate;

` Fig. 3 a similar View illustrating the appli-L cation of my invention to a triplicate book;

Fig. ft a plan view, partly broken away, of theparts shown in Fig. 2; and

Fig. 5 a perspective lview of a triplicate book constructed in accordance with my invention. y

In the drawings like numerals of reference indicate corresponding parts in the different figures. 4

In the form of book shown in Fig. 1, the original sheets or forms 1 are entirely separate from the duplicates 2, each being bound in with the stub of the book. The original sheet may be of `any rade of paper commonly employed for t is purpose, but the duplicate is formed of a translucent paper, the degree of translucency being sutcientto permit carbon compound transferred to the back of the sheet showing distinctly through at the front.

Behind the duplicate is secured a carbon sheetS, the sheet being preferably formed of very thin paper and very thinly coated with carbon compound. This carbon sheet is gummed or otherwise secured behind the duplicate so as to turn therewith in the handling of the book.

Preferably `the outer ends of the duplicate and carbon sheet are gummed together. The other ends may be bound in the stub of the book, but if for any reason-it is desired that the duplicates shall be removable from the book, it is necessary to gum the upper ends of the duplicates and carbon sheets together and preferably'to provide a 'line of weakness 4 to facilitate the tearing of the duplicate from the stub and to ensure Athat the tearing will take place above the connection between the carbon sheet and the duplicate, so that the two areremoved together as a unit.

In Fig. 2 is illustrated part of a book Of the 'l type in which the original l is connected with the outer end of the duplicate and is turned in over the duplicate. In this form, while the carbon sheet', the duplicate and the orig? the stub of the book in the manner set forth in describing the constructionA of the form shown in Fig. 1.@ v

In Figs. 3 and 5 I illustrate the complete embodiment of my invention in a triplicate book. In this form the original -1 is connected with the outer ends of a duplicate 2 and a carbon sheet 3. The inner ends of the dupli' cate and carbon sheet may be connected in the book in the ymanner hereiribefore' described. In addition I show a second translucent sheet 5 behind `which is secured a carbon sheet 6 also in the manner hereinbefore described. When the book is in use the original is thrown over to lie on top of the sheet 5, which, with its carbon sheet 6, overlies the duplicate 2 and its carbon sheet 3. 1

As a matter of practice the sheet 2 of a triplicate book is commonly known as the triplicate, while the sheet 5 is known as the duplicate. So also it is usual to so arrange the book that the sheets 5 remain bound in the book, while the sheets 2 are usually 'torn out. In this formof book it will be usual therefore to provide a line ofweakness. along which the duplicates 2 may be torn from the book, while a line of weakness isalso pref-A erably-provided to enable the originals to be torn'loose from the duplicates 2.

In a triplicate book it ywill usually be preferable to makethe originals l integral with the carbon sheets 3 and to makethe sheets 5 integral with the carbon sheets 6." See Fig. 5.

It will be evident that more than two copies of the original may be obtained by adding further duplicate and carbon sheets. It will also be evident that the essential feature o f my invention, which is the substantially permanent securing of the carbon sheet be` hind the translucent duplicate sheet, may beembodied in forms and books of many different types other than those illustrated.

In books of the construction illustrated and l described, it will usually be necessary to use a rest or stop card between the set `of leaves being written upon and those beneathlin order .to prevent duplication on the set of leaves next beneath when the book is used from the front, or in case the book is-used from the back, to prevent duplication on the leaves already written upon when the same `need to concern himself with the positioning of the carbon sheets. Manipulation is also facilitated in'that the leaves of each set are not easily mixed or .Confused with the leaves of other sets. The book will be clean to handle, as at no time do the fingers of the user come into contact with the carbonized surfaces of the carbon sheets. As the duplicates have the transferred coating of the carbon sheets on their under sides, which are always covered by carbonsheets, the carbon copies cannot be smudged and cannot soil the iingers of those who may require to handle them after the sale has been made.

Another advantage ofmy construction is with.

2. In manifolding books, the combination of an orginal sheet folded.` on itself, the upper surfaceof the under part being carbonized; a duplicate sheet of translucent matef rial secured over the coated surface so as to remain permanently in connection therewith; a second translucent sheet adapted to overlie the first and a carbon sheet coated on one side secured behind the translucent sheet with the coated side next said sheet, so as to turn with said sheet in the handlingof the book. i

3. In manifolding books, the combination with a plurality of original sheets of a plurality of duplica-te sheets, one for each original, each duplicate comprising a base sheet carbonized on its upper face only and a sheet of thin paper secured over the carbonized face of the base sheet so as to permanently cover the same, the thin cover sheet being suficiently translucent to show at itsouter face records transferred to its back from the carbon coating of the base sheet.

Signed at Toronto, Can., this February, 1925.`

LOUIS HUFF MAN.

5th day of 

